<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      var obj = {
        a: 1,
        foo: () => {
          console.log(this);
        }
      };
      obj.foo();
    </script>
  </body>
</html>
